diff --git a/ts/services/releaseNotesFetcher.ts b/ts/services/releaseNotesFetcher.ts
index cdff63af5a..c233ef87cb 100644
--- a/ts/services/releaseNotesFetcher.ts
+++ b/ts/services/releaseNotesFetcher.ts
@@ -18,6 +18,7 @@ import { incrementMessageCounter } from '../util/incrementMessageCounter';
 import { SeenStatus } from '../MessageSeenStatus';
 import { saveNewMessageBatcher } from '../util/messageBatcher';
 import { generateMessageId } from '../util/generateMessageId';
+import type { RawBodyRange } from '../types/BodyRange';
 import { BodyRange } from '../types/BodyRange';
 import * as RemoteConfig from '../RemoteConfig';
 import { isBeta, isProduction } from '../util/version';
@@ -50,6 +51,13 @@ export type ReleaseNoteType = ReleaseNoteResponseType &
 
 let initComplete = false;
 
+const STYLE_MAPPING: Record<string, BodyRange.Style> = {
+  bold: BodyRange.Style.BOLD,
+  italic: BodyRange.Style.ITALIC,
+  strikethrough: BodyRange.Style.STRIKETHROUGH,
+  spoiler: BodyRange.Style.SPOILER,
+  mono: BodyRange.Style.MONOSPACE,
+};
 export class ReleaseNotesFetcher {
   #timeout: NodeJS.Timeout | undefined;
   #isRunning = false;
@@ -245,10 +253,37 @@ export class ReleaseNotesFetcher {
           return;
         }
 
-        const { title, body } = note;
-        const messageBody = `${title}\n\n${body}`;
-        const bodyRanges = [
+        const { title, body, bodyRanges: noteBodyRanges } = note;
+        const titleBodySeparator = '\n\n';
+        const filteredNoteBodyRanges: Array<RawBodyRange> = (
+          noteBodyRanges ?? []
+        )
+          .map(range => {
+            if (
+              range.length == null ||
+              range.start == null ||
+              range.style == null ||
+              !STYLE_MAPPING[range.style] ||
+              range.start + range.length - 1 >= body.length
+            ) {
+              return null;
+            }
+
+            const relativeStart =
+              range.start + title.length + titleBodySeparator.length;
+
+            return {
+              start: relativeStart,
+              length: range.length,
+              style: STYLE_MAPPING[range.style],
+            };
+          })
+          .filter(isNotNil);
+
+        const messageBody = `${title}${titleBodySeparator}${body}`;
+        const bodyRanges: Array<RawBodyRange> = [
           { start: 0, length: title.length, style: BodyRange.Style.BOLD },
+          ...filteredNoteBodyRanges,
         ];
         const timestamp = Date.now() + index;
 
diff --git a/ts/test-mock/release-notes/release_notes_test.ts b/ts/test-mock/release-notes/release_notes_test.ts
index 7b0250b341..eca28aaaf0 100644
--- a/ts/test-mock/release-notes/release_notes_test.ts
+++ b/ts/test-mock/release-notes/release_notes_test.ts
@@ -4,6 +4,7 @@
 import createDebug from 'debug';
 
 import { expect } from 'playwright/test';
+import { assert } from 'chai';
 import type { App } from '../playwright';
 import { Bootstrap } from '../bootstrap';
 import { MINUTE } from '../../util/durations';
@@ -41,7 +42,7 @@ describe('release notes', function (this: Mocha.Suite) {
     await bootstrap.teardown();
   });
 
-  it('shows release notes with an image', async () => {
+  it('shows release notes with an image and body ranges', async () => {
     const firstWindow = await app.getWindow();
 
     await firstWindow.evaluate('window.SignalCI.resetReleaseNotesFetcher()');
@@ -68,5 +69,68 @@ describe('release notes', function (this: Mocha.Suite) {
     await expect(
       timelineMessage.locator('img.module-image__image')
     ).toBeVisible();
+    const boldCallBodyRange = timelineMessage
+      .locator('span > strong')
+      .getByText('Call', { exact: true });
+
+    assert.isTrue(
+      await boldCallBodyRange.isVisible(),
+      'expected message to have bold text'
+    );
+
+    const italicBodyRange = timelineMessage
+      .locator('span > em')
+      .getByText('links', { exact: true });
+
+    assert.isTrue(
+      await italicBodyRange.isVisible(),
+      'expected message to have italicized text'
+    );
+
+    const strikethroughBodyRange = timelineMessage
+      .locator('span > s')
+      .getByText('are', { exact: true });
+
+    assert.isTrue(
+      await strikethroughBodyRange.isVisible(),
+      'expected message to have strikethrough text'
+    );
+
+    const spoilerBodyRange = timelineMessage
+      .locator('.MessageTextRenderer__formatting--spoiler')
+      .getByText('the', { exact: true });
+
+    assert.isTrue(
+      (await spoilerBodyRange.count()) > 0,
+      'expected message to have spoiler text'
+    );
+
+    const monospaceBodyRange = timelineMessage
+      .locator('span.MessageTextRenderer__formatting--monospace')
+      .getByText('missing', { exact: true });
+
+    assert.isTrue(
+      await monospaceBodyRange.isVisible(),
+      'expected message to have monospace text'
+    );
+
+    const secondTimelineMessage = await getTimelineMessageWithText(
+      secondWindow,
+      'Bold text has invalid ranges, italic has valid'
+    );
+
+    await expect(secondTimelineMessage).toBeVisible();
+
+    const boldCallBodyRanges = secondTimelineMessage.locator('span > strong');
+
+    // 1 for the title
+    assert.isTrue((await boldCallBodyRanges.count()) === 1);
+
+    const italicBodyRanges = secondTimelineMessage.locator('span > em');
+
+    assert.isTrue(
+      (await italicBodyRanges.count()) === 1,
+      'expected message to have italic text'
+    );
   });
 });
diff --git a/ts/test-mock/updates-data/dynamic/release-notes/release-notes-v2.json b/ts/test-mock/updates-data/dynamic/release-notes/release-notes-v2.json
index ea79791d37..2f3d5d96fc 100644
--- a/ts/test-mock/updates-data/dynamic/release-notes/release-notes-v2.json
+++ b/ts/test-mock/updates-data/dynamic/release-notes/release-notes-v2.json
@@ -10,6 +10,12 @@
       "desktopMinVersion": "7.30.0",
       "androidMinVersion": "1482",
       "uuid": "1813845b-cc98-4210-a07c-164f9b328ca8"
+    },
+    {
+      "ctaId": "sample_note",
+      "desktopMinVersion": "7.30.0",
+      "androidMinVersion": "1482",
+      "uuid": "f47ac10b-58cc-4372-a567-0e02b2c3d479"
     }
   ],
   "megaphones": [
diff --git a/ts/test-mock/updates-data/static/release-notes/1813845b-cc98-4210-a07c-164f9b328ca8/en.json b/ts/test-mock/updates-data/static/release-notes/1813845b-cc98-4210-a07c-164f9b328ca8/en.json
index 4e05b0b187..443b796098 100644
--- a/ts/test-mock/updates-data/static/release-notes/1813845b-cc98-4210-a07c-164f9b328ca8/en.json
+++ b/ts/test-mock/updates-data/static/release-notes/1813845b-cc98-4210-a07c-164f9b328ca8/en.json
@@ -1,4 +1,11 @@
 {
+  "bodyRanges": [
+    { "style": "bold", "start": 0, "length": 4 },
+    { "style": "italic", "start": 5, "length": 5 },
+    { "style": "strikethrough", "start": 11, "length": 3 },
+    { "style": "spoiler", "start": 15, "length": 3 },
+    { "style": "mono", "start": 19, "length": 7 }
+  ],
   "mediaHeight": "864",
   "mediaWidth": "1536",
   "media": "/static/release-notes/call_links.png",
diff --git a/ts/test-mock/updates-data/static/release-notes/f47ac10b-58cc-4372-a567-0e02b2c3d479/en.json b/ts/test-mock/updates-data/static/release-notes/f47ac10b-58cc-4372-a567-0e02b2c3d479/en.json
new file mode 100644
index 0000000000..69552cb891
--- /dev/null
+++ b/ts/test-mock/updates-data/static/release-notes/f47ac10b-58cc-4372-a567-0e02b2c3d479/en.json
@@ -0,0 +1,13 @@
+{
+  "bodyRanges": [
+    { "style": "bold", "start": 109, "length": 1 },
+    { "style": "bold", "start": 0, "length": 110 },
+    { "style": "bold", "start": 10, "length": 0 },
+    { "style": "bold", "start": 10, "length": 100 },
+    { "style": "italic", "start": 100, "length": 9 }
+  ],
+  "uuid": "f47ac10b-58cc-4372-a567-0e02b2c3d479",
+  "title": "Formatting Test",
+  "body": "Sample body text that tests formatting boundaries. Bold text has invalid ranges, italic has valid. length 109",
+  "callToActionText": "Create Call Link"
+}
diff --git a/ts/textsecure/WebAPI.ts b/ts/textsecure/WebAPI.ts
index 411d0a4b05..e94e8fbd88 100644
--- a/ts/textsecure/WebAPI.ts
+++ b/ts/textsecure/WebAPI.ts
@@ -1231,9 +1231,9 @@ export const releaseNoteSchema = z.object({
   bodyRanges: z
     .array(
       z.object({
-        style: z.string(),
-        start: z.number(),
-        length: z.number(),
+        style: z.string().optional(),
+        start: z.number().optional(),
+        length: z.number().optional(),
       })
     )
     .optional(),